Try RockDirect's Quaddra XT. Its about £1196 inc VAT and Delivery. It has produced some good benchmark scores. The inclusion of an ATI 9000 graphics chip also makes it good for gaming. It also has a strong battery life as well.
For a better choice look at PC Advisor's Top Ten Laptop choices every month.
My mum read the tables from PC Advisor and decided to buy HI-Grade UltiNote M6600-2200, the price is £1173.83(inc VAT exc Del) it's a great laptop, it will also manage to play games, however I know that laptops are now becoming more powerful to handle 3D games, I would buy a desktop computer to have a better gaming experince. If the laptop is out of Budget, I would go for what SheffieldSpy has recommended.